Method and device for data transmission, and storage medium

Abstract

A method for data transmission includes: during Bluetooth communication, negotiating, by transmitting a sounding data packet at a data size which is a candidate value of a maximum transmission unit (MTU), with a second electronic device about an applied value of the MTU for the Bluetooth communication. Through the technical solution according to embodiments of the disclosure, MTU sounding is performed by sending a data packet during data transmission between Bluetooth devices. Through the MTU negotiation between the two parties of interaction, an appropriate and stable MTU value is finally obtained to serve as a standard parameter of the interaction.

The invention claimed is: 
     
       1. A method for data transmission, applied to a first electronic device and comprising:
 during Bluetooth communication, negotiating, by transmitting a sounding data packet at a data size which is a candidate value of a maximum transmission unit (MTU), with a second electronic device about an applied value of the MTU for the Bluetooth communication, 
 wherein the negotiating, by transmitting the sounding data packet at the data size which is the candidate value of the MTU, with the second electronic device about the applied value of the MTU for the Bluetooth communication comprises: 
 sending, according to the candidate value of the MTU, the sounding data packet for the Bluetooth communication to the second electronic device; 
 receiving a feedback data packet from the second electronic device within a preset period of time; 
 in response to that a data size of the received feedback data packet is equal to that of the sounding data packet, determining the candidate value of the MTU to be the applied value of the MTU for the Bluetooth communication between the first electronic device and the second electronic device; 
 decrementing the candidate value of the MTU, in response to receiving no feedback data packet at a data size which is equal to that of the sounding data packet; 
 according to the decremented candidate value of the MTU, continuing to negotiate, by transmitting a sounding data packet at a data size which is the decremented candidate value of the MTU, with the second electronic device about the applied value of the MTU for the Bluetooth communication; and 
 stopping negotiation of the MTU, in response to receiving, from the second electronic device, the feedback data packet at the data size which is equal to that of the sounding data packet, or in response to that the candidate value has been decremented to a minimum candidate value of the MTU. 
 
     
     
       2. The method of  claim 1 , wherein the decrementing the candidate value of the MTU, in response to receiving no feedback data packet at a data size which is equal to that of the sounding data packet comprises:
 in response to receiving, from the second electronic device within the preset period of time, a feedback data packet at a data size which is different from that of the sounding data packet, decrementing the candidate value of the MTU according to the data size of the feedback data packet; or 
 in response to receiving, from the second electronic device within the preset period of time, a feedback data packet at a data size which is different from that of the sounding data packet, decrementing the candidate value of the MTU according to a first predetermined adjustment value. 
 
     
     
       3. The method of  claim 1 , wherein the decrementing the candidate value of the MTU, in response to receiving no feedback data packet at a data size which is equal to that of the sounding data packet comprises:
 in response to receiving no feedback data packet from the second electronic device within the preset period of time, decrementing the candidate value of the MTU according to a second predetermined adjustment value. 
 
     
     
       4. The method of  claim 1 , wherein the negotiating, by transmitting the sounding data packet at the data size which is the candidate value of the MTU, with the second electronic device about the applied value of the MTU for the Bluetooth communication further comprises:
 in response receiving no feedback data packet at a data size which is equal to that of the sounding data packet, determining a minimum candidate value to be the applied value of the MTU. 
 
     
     
       5. The method of  claim 1 , wherein during the Bluetooth communication, the negotiating, by transmitting the sounding data packet at the data size which is the candidate value of the MTU, with the second electronic device about the applied value of the MTU for the Bluetooth communication comprises:
 after data transmission is initiated in the Bluetooth communication, negotiating with the second electronic device about the applied value of the MTU for the Bluetooth communication, by transmitting, at a predetermined interval or at a moment when the data transmission is suspended, the sounding data packet at the data size which is the candidate value of the MTU. 
 
     
     
       6. A non-transitory computer-readable storage medium having computer-executable instructions stored thereon for execution by a processor to implement steps of the method for data transmission of  claim 1 . 
     
     
       7. A method for data transmission, applied to a second electronic device and comprising:
 during Bluetooth communication, receiving a sounding data packet for the Bluetooth communication, wherein the sounding data packet is sent by a first electronic device according to a candidate value of a maximum transmission unit (MTU); and 
 sending a feedback data packet to the first electronic device according to a data size of the sounding data packet, wherein the feedback data packet is used for the first electronic device to determine an applied value of the MTU, 
 wherein the sending the feedback data packet to the first electronic device according to the data size of the sounding data packet comprises: 
 determining whether the data size of the sounding data packet is equal to a predetermined MTU of the second electronic device; 
 in response to that the data size of the sounding data packet is equal to the predetermined MTU, sending, to the first electronic device, the feedback data packet at a data size which is equal to that of the sounding data packet, wherein the feedback data packet is used for the first electronic device to determine the candidate value of the MTU as the applied value of the MTU for the Bluetooth communication between the first electronic device and the second electronic device; and 
 in response to that the data size of the sounding data packet is different from the predetermined MTU, sending, to the first electronic device, the feedback data packet at a data size which is smaller than or equal to that of the sounding data packet. 
 
     
     
       8. A device for data transmission, applied to a second electronic device and comprising:
 a processor; and 
 memory for storing instructions executable by the processor; 
 wherein the processor is configured to: 
 during Bluetooth communication, receive a sounding data packet for the Bluetooth communication, wherein the sounding data packet is sent by a first electronic device according to a candidate value of a maximum transmission unit (MTU); and 
 send a feedback data packet to the first electronic device according to a data size of the sounding data packet, wherein the feedback data packet is used for the first electronic device to determine an applied value of the MTU, 
 wherein the processor is further configured to: 
 determine whether the data size of the sounding data packet is equal to a predetermined MTU of the second electronic device; 
 in response to that the data size of the sounding data packet is equal to the predetermined MTU, send, to the first electronic device, the feedback data packet at a data size which is equal to that of the sounding data packet, wherein the feedback data packet is used for the first electronic device to determine the candidate value of the MTU as the applied value of the MTU for the Bluetooth communication between the first electronic device and the second electronic device; and 
 in response to that the data size of the sounding data packet is different from the predetermined MTU, send, to the first electronic device, the feedback data packet at a data size which is smaller than or equal to that of the sounding data packet. 
 
     
     
       9. A device for data transmission, applied to a first electronic device and comprising:
 a processor; and 
 memory for storing instructions executable by the processor; 
 wherein the processor is configured to: during Bluetooth communication, negotiate, by transmitting a sounding data packet at a data size which is a candidate value of a maximum transmission unit (MTU), with a second electronic device about an applied value of the MTU for the Bluetooth communication, 
 wherein the processor is further configured to: 
 send, according to the candidate value of the MTU, the sounding data packet for the Bluetooth communication to the second electronic device; 
 receive a feedback data packet from the second electronic device within a preset period of time; 
 in response to that a data size of the received feedback data packet is equal to that of the sounding data packet, determine the candidate value of the MTU to be the applied value of the MTU for the Bluetooth communication between the first electronic device and the second electronic device; 
 decrement the candidate value of the MTU in response to receiving no feedback data packet at a data size which is equal to that of the sounding data packet; 
 according to the decremented candidate value of the MTU, continue to negotiate, by transmitting a sounding data packet at a data size which is the decremented candidate value of the MTU, with the second electronic device about the applied value of the MTU for the Bluetooth communication; and 
 stop negotiation of the MTU, in response to receiving, from the second electronic device, the feedback data packet at the data size which is equal to that of the sounding data packet, or in response to that the candidate value has been decremented to a minimum candidate value of the MTU. 
 
     
     
       10. The device of  claim 9 , wherein the processor is further configured to:
 in response to receiving, from the second electronic device within the preset period of time, a feedback data packet at a data size which is different from that of the sounding data packet, decrement the candidate value of the MTU according to the data size of the feedback data packet; or 
 in response to receiving, from the second electronic device within the preset period of time, a feedback data packet at a data size which is different from that of the sounding data packet, decrement the candidate value of the MTU according to a first predetermined adjustment value. 
 
     
     
       11. The device of  claim 9 , wherein the processor is further configured to:
 in response to receiving no feedback data packet from the second electronic device within the preset period of time, decrement the candidate value of the MTU according to a second predetermined adjustment value. 
 
     
     
       12. The device of  claim 9 , wherein the processor is further configured to:
 in response receiving no feedback data packet at a data size which is equal to that of the sounding data packet, determine a minimum candidate value to be the applied value of the MTU. 
 
     
     
       13. The device of  claim 9 , wherein the processor is further configured to:
 after data transmission is initiated in the Bluetooth communication, negotiate with the second electronic device about the applied value of the MTU for the Bluetooth communication, by transmitting, at a predetermined interval or at a moment when the data transmission is suspended, the sounding data packet at the data size which is the candidate value of the MTU.